Which of the following is NOT a method of hydrotherapy?

Shortwave diathermy is a therapeutic modality that uses electromagnetic energy to generate heat within the tissues. Unlike the other methods listed, which involve the use of water and its properties to facilitate treatment, shortwave diathermy does not incorporate water as a medium.

Hydrotherapy methods, such as aquatic therapy pools, ice slush immersion, and warm whirlpools, all utilize water in various forms to promote healing and rehabilitation. Aquatic therapy pools provide a buoyant environment for improving strength and mobility, ice slush immersion offers cold therapy to reduce inflammation and pain, and warm whirlpools facilitate muscle relaxation and improve circulation.

In contrast, shortwave diathermy operates on principles of electromagnetic energy rather than the physiological effects of water, affirming its distinction from hydrotherapy practices.